- Why does radiation taste like metal?
Why do high levels of radiation taste like metal?
Radiation therapy to the mouth, and in particular to the taste buds on the tongue, will affect your taste. You may begin to experience this side effect one to two weeks after treatment has started. You will commonly notice that foods will lack distinct tastes and occasionally notice a metallic taste in your mouth. After treatment has been completed, your taste buds will gradually return to normal.